Section 625.380 - Requirements for monuments1. Except as otherwise provided in subsection 3, monuments set must be sufficient in number and durability and efficiently placed so as not to be readily disturbed to ensure, together with monuments already existing, the perpetuation of facile re-establishment of any point or line of the survey.2. Any monument set by a professional land surveyor to mark or reference a point on a property or boundary line must be permanently and visibly marked or tagged with the number of the license of the professional land surveyor setting it, each number to be preceded by the letters "P.L.S."3. Except as otherwise provided in subsection 4, if a monument cannot be set or reset because of steep terrain, water, marsh or existing structures, or if it would be obliterated as a result of construction or maintenance of any highway under the jurisdiction of the Department of Transportation, one or more reference monuments, as defined in NRS 329.120, must be set. In addition to the requirements for a monument set forth in subsections 1 and 2, the letters "RM" must be stamped in the tablet, disc or cap of the reference monument. One reference monument may be used if it is set on the actual line or a prolongation thereof. In all other cases, at least two reference monuments must be used. If the reference monuments do not appear on a record of survey filed in accordance with the provisions of NRS 625.340 to 625.380, inclusive, a corner record must be filed pursuant to chapter 329 of NRS.4. The provisions of subsection 3 do not apply if federal law prohibits the destruction or removal of a monument.[Part 15:198:1919; added 1947, 797; A 1949, 639; 1953, 196; 1955, 391]-(NRS A 1989, 786; 1997, 1049; 1999, 963)[Part 15:198:1919; added 1947, 797; A 1949, 639; 1953, 196; 1955, 391] - (NRS A 1989, 786; 1997, 1049; 1999, 963)